Texas Hold'em
In Texas Hold'em, each player is given 2 pocket cards. The game continues with a total of 5 community cards face up, first 3, then 1 after the other. Between each deal there is a round of betting.
Hold'em is played with two blinds (a bet before the pocket cards are received). The first two players after the dealer pay the blinds. The small blind is posted by the first player and the big blind by the second. In heads-up games, the player seated after the dealer pays the big blind. The first two betting rounds are played with the lower limit while the last two rounds of betting are played with the higher limit.
Omaha
Omaha is a poker game derived from Texas Hold'em. Each player is dealt four cards ("hole cards"), which belong only to that player. Five community cards are dealt face-up on the "board". All players use three of the five community cards together with two of their hole cards to make the best five-card poker hand.
Omaha Hi/Lo
The player with the best five-card hand for high wins half the pot, and the player with the best hand for low wins the other half. In Omaha, players must use two and only two of their four hole cards in combination with three cards from the board. In the event of identical hands, the high and low shares of the pot will be equally divided between the players with the best hands. In the event that no hand qualifies for low, the best hand(s) for high wins the pot.
For a five card hand to qualify for low, it cannot include cards higher than 8 or contain any pairs. Aces can be used for both high and low. When comparing low hands, the winner is the hand with the lowest high card, thus 3, 4, 5, 6, 7 is better than Ace, 2, 3, 4, 8. The best possible low hand is Ace, 2, 3, 4, 5.